使用本地广播

系统的全局广播可以被其他的应用程序接收到，这样容易引入安全性问题，所以只能在应用程序本地使用的广播可以成功地解决广播安全性的问题。
我们使用LocalBroadcastManager作为广播控制器，来使用它的registerReceiver()方法来注册广播接收器，使用它的sendBroadcast()方法来发送广播，从而实现本地广播的应用。
源码：
public class MainActivity extends ActionBarActivity implements View.OnClickListener {
private localBroadcastReceiver localBroadcastReceiver;
private LocalBroadcastManager localBroadcastManager;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
localBroadcastManager=LocalBroadcastManager.getInstance(this);
button= (Button) findViewById(R.id.button);
button.setOnClickListener(this);
//获取localBroadcastReceiver的实例；
IntentFilter intentFilter=new IntentFilter();
intentFilter.addAction(“xiaowang”);
localBroadcastReceiver= new localBroadcastReceiver();
localBroadcastManager.registerReceiver(localBroadcastReceiver,intentFilter);
}

@Overrideprotected void onDestroy() {    super.onDestroy();    localBroadcastManager.unregisterReceiver(localBroadcastReceiver);}@Overridepublic void onClick(View v) {    Intent intent=new Intent("xiaowang");    localBroadcastManager.sendBroadcast(intent);}

}
//localBroadcastReceiver类
public class localBroadcastReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,”receiver”,Toast.LENGTH_LONG).show();
}
}